This was the only information I could find on the Burnes family. I found the following in Encyclopedia of the history of Missouri by Howard Louis Conard.

Look at all the symbolism they crammed into one monument. The obvious angel, a crown, a palm leave, a cut tree, an Easter lily, and the drapery (Not sure if that was what they were going for but that is what I think it is. Why else would she have the material draped over her arm?). And if you notice in the bunch of flowers she is holding she has a daisy and a rose.